ESP8266 Serial WiFi Shield for Arduino

The shield is designed based on esp8266 by Espressif Systems, pin-compatible with Arduino UNO/Mega2560 DevBorad. WiFi module is industrial-grade chips ESP8266, which is ESP-12E with metal shield, strong anti-interference ability; Shield is pin-compatible with Arduino Uno, Mega2560 and other control board. A voltage converter chip is used to deal with 3.3V (Esp8266) and 5V (Arduino); Dual DIP switches is used for serial ports so that this module shield can be used alone as an Arduino Uno expansion board, and also be used as ESP8266 expansion board; Serial data is transported to WiFi device transparently, and vice versa. Arduino program does not need any configuration; WebServer is developed to configure WiFi parameters and serial port parameters; The module shield can be used as an independent ESP8266 development board. for instance, downloading the official AT commands firmware, NodeMCU open source firmware can be used; The module shield also can be used as stand-alone expansion board for Arduino Uno


  • 802.11 b / g / n wireless standards
  • STA / AP modes support
  • TCP / IP protocol stack, One socket
  • Supports standard TCP / UDP Server and Client
  • Supports serial port baud rate configuration: 1200/2400/4800/9600/19200/38400/57600/74800/115200 bps
  • Supports serial data bits: 5/6/7/8 bits
  • Supports serial parity: none
  • Supports serial stop bits: 1/2 bit
  • Pin-compatible with Arduino UNO, Mega
  • Arduino Pinout 2/3/4/5/6/7/8/9/10/11/12/13
  • ESP8266 GPIO Pinout 0/2/4/5/9/10/12/13/14/15/16 / ADC / EN / * UART TX / UART RX
  • KEY button: modes configuration
  • Dual-Ports DIP switches: switching Arduino and ESP8266
  • WiFi operation current: continuous transmission operation: ≈70mA (200mA MAX), idle mode: <200uA
  • Serial WiFi transmission rate: 110-460800bps
  • Temperature: -40 degree ~ + 125 degree
  • Humidity: 10 percent-90 degree non-condensing


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